stella_bringup, cartographer, teleop 패키지 launch,run 할 경우 ros2 command not found > STELLA_N2_Forum

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STELLA N2 SBC 버전: Raspberry pi 4

REMOTE PC 버전: 20.04

ROS 버전: ROS2 foxy

ros2 doctor 한 결과
원격 PC는 /opt/ros/foxy/lib/python3.8/site-packages/ros2doctor/api/package.py: 119: UserWarning: Cannot find required versions of packages: stella_ui_msg stella_ui stella_teleop stella_navigation2 stella_description [...] Use `ros2 doctor --report` to see full list.
/opt/ros/foxy/lib/python3.8/site-packages/ros2doctor/api/platform.py: 82: UserWarning: Distribution foxy is no longer supported or deprecated. To get the latest features, download the new versions at https://index.ros.org/doc/ros2/Installation/
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라즈베리파이는 /home/pi/ros_colcon_ws/build/ros2doctor/ros2doctor/api/__init__.py: 95: UserWarning: Check entry point PackageCheck fails to load.
/home/pi/ros_colcon_ws/build/ros2doctor/ros2doctor/api/platform.py: 83: UserWarning: Distribution foxy is no longer supported or deprecated. To get the latest features, download the new versions at https://index.ros.org/doc/ros2/Installation/
All 4 checks passed

 talker와 listener는 원격 PC에서 작동가능한데, stella_bringup, cartographer, teleop 패키지를  launch,run 할 경우 ros2 command not found오류가 발생하고 패키지가 실행가능했다가 갑자기 안되는등 불안정한데 해결방법을 알고 싶습니다. 감사합니다.